BGA can refer to:
- Bach-Gesellschaft Ausgabe, the first complete edition of the works of J.S. Bach
- Ball Grid Array, a type of surface-mount packaging used for integrated circuits
- Battle Ground Academy, a private school in Franklin, Tennessee, USA
- Behavior Genetics Association
- BGA, a bank in Honduras acquired by HSBC in 2007
- BGA, the IATA code for Palonegro International Airport in Bucaramanga, Colombia
- Break glass alarm, a type of manually activated fire alarm
- British Gliding Association
- British Go Association
- British Geophysical Association
- Barney's Great Adventure Barney's first and was only movie from 1997 based on the TV Series.
- Cyanobacteria (blue-green algae)
- Boldklubberne Glostrup Albertslund, a Danish football club